en:crowncoordinatesystem
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en:crowncoordinatesystem [2022/02/09 08:38] – onyxadmin | en:crowncoordinatesystem [2024/04/01 09:23] (current) – [Preface] onyxadmin | ||
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====== Crown Coordinate System ====== | ====== Crown Coordinate System ====== | ||
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- | To numerically describe | + | ===== Preface===== |
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+ | The verbal description of tooth movements | ||
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+ | The digital planning of tooth movements requires to formulate the anatomically non-orthogonal tooth coordinate system | ||
+ | The mathematically consistent modeling of tooth movements | ||
+ | \\ | ||
+ | ===== Crown coordinates===== | ||
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+ | The definitions | ||
{{: | {{: | ||
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//Note:// The measurement of inclination is always performed with reference to an arch plane that is aligned with the midpoint and endpoints of the arch curve and whose position and alignment can be adjusted by the user to the skeletal conditions in the jaw.\\ | //Note:// The measurement of inclination is always performed with reference to an arch plane that is aligned with the midpoint and endpoints of the arch curve and whose position and alignment can be adjusted by the user to the skeletal conditions in the jaw.\\ | ||
- | ==== Angulation ==== | + | ===== Angulation |
Rotation around the vestibular axis [perpendicular to m/d-axis and tooth axis] \\ | Rotation around the vestibular axis [perpendicular to m/d-axis and tooth axis] \\ | ||
Increasing angulation means the incisal landmark is moved/tilt in mesial direction and the apex landmark is moved/tilt in the opposite direction.\\ | Increasing angulation means the incisal landmark is moved/tilt in mesial direction and the apex landmark is moved/tilt in the opposite direction.\\ | ||
//Note:// The measurement of angulation is always performed with reference to an arch plane that is aligned with the midpoint and endpoints of the arch curve and whose position and alignment can be adjusted by the user to the skeletal conditions in the jaw.\\ | //Note:// The measurement of angulation is always performed with reference to an arch plane that is aligned with the midpoint and endpoints of the arch curve and whose position and alignment can be adjusted by the user to the skeletal conditions in the jaw.\\ | ||
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+ | ===== Tooth Displacements ===== | ||
+ | * Displacements along root axis are measured positive in apical direction | ||
+ | * Displacements along m/d axis are measured positive in mesial direction | ||
+ | * Displacements along vestibular axis are measured positive in vestibular direction | ||
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en/crowncoordinatesystem.1644392286.txt.gz · Last modified: 2022/02/09 08:38 by onyxadmin